Robotics
   - Robots work in the real physical world.
 
   - They are agents that work in that world.
 
   - They have  effectors
       to modify the world.
 
   - They have sensors to
       perceive the world.
 
   - They are not currently omnipresent, but there are a large number
       of industrial robots,
 
   - and mobile robots are becoming more common.